Marco Ianni had only moved to the Chelsea bench for the final stages of their clash with Manchester United with club hierarchy said to be "angry and deeply embarrassed" by this conduct.

Ianni, who is Maurizio Sarri's second assistant coach, sparked a touchline melee with his celebrations after Ross Barkley's dramatic equaliser.

Ianni ran onto the pitch before taunting Jose Mourinho, with the Manchester United boss reacting angrily to the celebrations.

Mourinho had to be restrained by stewards as tempers spilled over with Ianni later apologising after Sarri intervened.

Sky Sports reportChelsea chiefs are furious over the incident and believe Ianni's conduct falls well below the expected standards.

Marco Ianni celebrates (Image: EMPICS Sport)

Ianni taunts the United boss (Image: Catherine Ivill)

Remarkably, it is claimed the Chelsea coach had only been on the team bench for the closing stages of the encounter.

Ianni had been sat in the upper tier of the East Stand at Stamford Bridge for the large part before making his way down to the bench after Anthony Martial's second goal.

He did not break Premier League protocol and is entitled to move to the team bench in his role as analyst.

Stewards hold back Jose Mourinho (Image: Getty)

After the encounter, Mourinho attempted to move on from the incident and confirmed Ianni had apologised for his behaviour following the intervention of Blues boss Sarri.

He said: "I am not annoyed with anything. What happened was with Sarri's assistant, and Sarri was the first one to come to me to say he would resolve the problem internally with me. After that his assistant come to me in Sarri's office and apologised to me.

"I immediately said if you really feel that way, and you want to apologise, of course I accept apologies, and to forget it because I made lots of mistakes in my career. So I'm not going to kill you because of one."

Sarri added: "I am not really happy. As I said before, after I have spoken with Jose I understood that we were on the wrong side of the situation."